Beppe/Samp and Nedved/Schick suggests we'd be in a good position to sign him if we really do want him.
Samp also don't sell for astronomical fees, but Schick would surely be the biggest in recent times. He also most probably won't go for that release clause.
Since the silly fee days (early 00s) when they sold Montella:
10/11 Pazzini > Inter €18m
16/17 Soriano > Villarreal €14m
13/14 Icardi > Inter €13m
16/17 Correa > Sevilla €13m
14/15 Gabbiadini > Napoli €12.5m
16/17 Fernando > Spartak €12.5m
16/17 Eder > Inter €10m
13/14 Poli > Milan €10m
I reckon he'll sign a new contract then we'll get him for €30m + p/e